diff --git a/kdiff3plugin/kdiff3plugin.cpp b/kdiff3plugin/kdiff3plugin.cpp
index ec008f1..53360b6 100755
--- a/kdiff3plugin/kdiff3plugin.cpp
+++ b/kdiff3plugin/kdiff3plugin.cpp
@@ -101,17 +101,17 @@ KDiff3Plugin::KDiff3Plugin( KonqPopupMenu* pPopupmenu, const char *name, const T
    if(m_list.count() == 1)
    {
       int historyCount = s_pHistory ? s_pHistory->count() : 0;
-      s = i18n("Compare with %1").arg( historyCount>0 ? s_pHistory->front() : TQString() );
+      s = i18n("Compare with %1").tqarg( historyCount>0 ? s_pHistory->front() : TQString() );
       pAction = new KAction ( s,0, this, TQT_SLOT(slotCompareWith()), actionCollection());
       pAction->setEnabled( m_list.count()>0 && historyCount>0 );
       pActionMenu->insert (pAction);
 
-      s = i18n("Merge with %1").arg( historyCount>0 ? s_pHistory->front() : TQString() );
+      s = i18n("Merge with %1").tqarg( historyCount>0 ? s_pHistory->front() : TQString() );
       pAction = new KAction( s, 0, this, TQT_SLOT(slotMergeWith()), actionCollection());
       pAction->setEnabled( m_list.count()>0 && historyCount>0 );
       pActionMenu->insert (pAction);
 
-      s = i18n("Save '%1' for later").arg( ( m_list.front() ) );
+      s = i18n("Save '%1' for later").tqarg( ( m_list.front() ) );
       pAction = new KAction ( s, 0, this, TQT_SLOT(slotSaveForLater()), actionCollection());
       pAction->setEnabled( m_list.count()>0 );
       pActionMenu->insert(pAction);
diff --git a/src/common.cpp b/src/common.cpp
index 79f27ed..0a1952e 100644
--- a/src/common.cpp
+++ b/src/common.cpp
@@ -25,7 +25,7 @@
 #include <tqsize.h>
 #include <tqpoint.h>
 #include <tqstringlist.h>
-#include <textstream.h>
+#include <tqtextstream.h>
 
 ValueMap::ValueMap()
 {
diff --git a/src/diff.cpp b/src/diff.cpp
index 28dfb4a..136275c 100644
--- a/src/diff.cpp
+++ b/src/diff.cpp
@@ -27,7 +27,7 @@
 #include <klocale.h>
 #include <tqfileinfo.h>
 #include <tqdir.h>
-#include <textcodec.h>
+#include <tqtextcodec.h>
 
 #include <map>
 #include <assert.h>
@@ -492,7 +492,7 @@ void SourceData::readAndPreprocess( TQTextCodec* pEncoding, bool bAutoDetectUnic
             KMessageBox::error(m_pOptionDialog, 
                i18n("Preprocessing possibly failed. Check this command:\n\n  %1"
                   "\n\nThe preprocessing command will be disabled now."
-               ).arg(cmd) );
+               ).tqarg(cmd) );
             m_pOptionDialog->m_PreProcessorCmd = "";
             m_normalData.readFile( fileNameIn1 );
             pEncoding1 = m_pEncoding;
@@ -527,7 +527,7 @@ void SourceData::readAndPreprocess( TQTextCodec* pEncoding, bool bAutoDetectUnic
             KMessageBox::error(m_pOptionDialog, 
                i18n("The line-matching-preprocessing possibly failed. Check this command:\n\n  %1"
                     "\n\nThe line-matching-preprocessing command will be disabled now."
-                   ).arg(cmd) );
+                   ).tqarg(cmd) );
             m_pOptionDialog->m_LineMatchingPreProcessorCmd = "";
             m_lmppData.readFile( fileNameIn2 );
          }
@@ -557,7 +557,7 @@ void SourceData::readAndPreprocess( TQTextCodec* pEncoding, bool bAutoDetectUnic
       m_lmppData.m_v.resize( m_normalData.m_vSize );
       for(int i=m_lmppData.m_vSize; i<m_normalData.m_vSize; ++i )
       {  // Set all empty lines to point to the end of the buffer.
-         m_lmppData.m_v[i].pLine = m_lmppData.m_unicodeBuf.unicode()+m_lmppData.m_unicodeBuf.length();
+         m_lmppData.m_v[i].pLine = m_lmppData.m_tqunicodeBuf.tqunicode()+m_lmppData.m_tqunicodeBuf.length();
       }
 
       m_lmppData.m_vSize = m_normalData.m_vSize;
@@ -567,8 +567,8 @@ void SourceData::readAndPreprocess( TQTextCodec* pEncoding, bool bAutoDetectUnic
    if ( m_pOptionDialog->m_bIgnoreCase )
    {
       int i;
-      TQChar* pBuf = const_cast<TQChar*>(m_lmppData.m_unicodeBuf.unicode());
-      int ucSize = m_lmppData.m_unicodeBuf.length();
+      TQChar* pBuf = const_cast<TQChar*>(m_lmppData.m_tqunicodeBuf.tqunicode());
+      int ucSize = m_lmppData.m_tqunicodeBuf.length();
       for(i=0; i<ucSize; ++i)
       {
          pBuf[i] = pBuf[i].upper();
@@ -604,7 +604,7 @@ void SourceData::readAndPreprocess( TQTextCodec* pEncoding, bool bAutoDetectUnic
 /** Prepare the linedata vector for every input line.*/
 void SourceData::FileData::preprocess( bool bPreserveCR, TQTextCodec* pEncoding )
 {
-   //m_unicodeBuf = decodeString( m_pBuf, m_size, eEncoding );
+   //m_tqunicodeBuf = decodeString( m_pBuf, m_size, eEncoding );
 
    long skipBytes = 0;
    TQTextCodec* pCodec = ::detectEncoding( m_pBuf, m_size, skipBytes );
@@ -616,11 +616,11 @@ void SourceData::FileData::preprocess( bool bPreserveCR, TQTextCodec* pEncoding
    TQTextStream ts( ba, IO_ReadOnly );
    ts.setCodec( pEncoding);
    //ts.setAutoDetectUnicode( false );
-   m_unicodeBuf = ts.read();
+   m_tqunicodeBuf = ts.read();
    ba.resetRawData( m_pBuf+skipBytes, m_size-skipBytes );
 
-   int ucSize = m_unicodeBuf.length();
-   const TQChar* p = m_unicodeBuf.unicode();
+   int ucSize = m_tqunicodeBuf.length();
+   const TQChar* p = m_tqunicodeBuf.tqunicode();
 
    m_bIsText = true;
    int lines = 1;
@@ -770,9 +770,9 @@ static void checkLineForComments(
 void SourceData::FileData::removeComments()
 {
    int line=0;
-   TQChar* p = const_cast<TQChar*>(m_unicodeBuf.unicode());
+   TQChar* p = const_cast<TQChar*>(m_tqunicodeBuf.tqunicode());
    bool bWithinComment=false;
-   int size = m_unicodeBuf.length();
+   int size = m_tqunicodeBuf.length();
    for(int i=0; i<size; ++i )
    {
 //      std::cout << "2        " << std::string(&p[i], m_v[line].size) << std::endl;
@@ -1190,7 +1190,7 @@ void correctManualDiffAlignment( Diff3LineList& d3ll, ManualDiffHelpList* pManua
    if ( pManualDiffHelpList->empty() )
       return;
 
-   // If a line appears unaligned in comparison to the manual alignment, correct this.
+   // If a line appears unaligned in comparison to the manual tqalignment, correct this.
 
    ManualDiffHelpList::iterator iMDHL;
    for( iMDHL =  pManualDiffHelpList->begin(); iMDHL != pManualDiffHelpList->end(); ++iMDHL )
@@ -1228,7 +1228,7 @@ void correctManualDiffAlignment( Diff3LineList& d3ll, ManualDiffHelpList* pManua
 
       if (wi>=1 && wi <= 3)
       {
-         // Found manual alignment for one source
+         // Found manual tqalignment for one source
          Diff3LineList::iterator iDest = i3;
 
          // Move lines up until the next firstLine is found. Omit wi from move and search.
diff --git a/src/diff.h b/src/diff.h
index 2866f5f..ee3076e 100644
--- a/src/diff.h
+++ b/src/diff.h
@@ -22,7 +22,7 @@
 #include <tqpixmap.h>
 #include <tqtimer.h>
 #include <tqframe.h>
-#include <textstream.h>
+#include <tqtextstream.h>
 #include <tqpainter.h>
 #include <list>
 #include <vector>
@@ -169,10 +169,10 @@ public:
 typedef std::vector<Diff3WrapLine> Diff3WrapLineVector;
 
 
-class TotalDiffStatus
+class TotalDifftqStatus
 {
 public:
-   TotalDiffStatus(){ reset(); }
+   TotalDifftqStatus(){ reset(); }
    void reset() {bBinaryAEqC=false; bBinaryBEqC=false; bBinaryAEqB=false;
                  bTextAEqC=false;   bTextBEqC=false;   bTextAEqB=false;
                  nofUnsolvedConflicts=0; nofSolvedConflicts=0;
@@ -293,7 +293,7 @@ private:
       const char* m_pBuf;
       int m_size;
       int m_vSize; // Nr of lines in m_pBuf1 and size of m_v1, m_dv12 and m_dv13
-      TQString m_unicodeBuf;
+      TQString m_tqunicodeBuf;
       std::vector<LineData> m_v;
       bool m_bIsText;
       bool readFile( const TQString& filename );
diff --git a/src/difftextwindow.cpp b/src/difftextwindow.cpp
index d5fb8a9..3c570e4 100644
--- a/src/difftextwindow.cpp
+++ b/src/difftextwindow.cpp
@@ -28,8 +28,8 @@
 #include <tqlineedit.h>
 #include <tqlabel.h>
 #include <tqpushbutton.h>
-#include <layout.h>
-#include <textcodec.h>
+#include <tqlayout.h>
+#include <tqtextcodec.h>
 #include <optiondialog.h>
 #include <math.h>
 #include <cstdlib>
@@ -860,9 +860,9 @@ void DiffTextWindowData::writeLine(
             else
             {
                p.fillRect( xOffset + fontWidth*outPos, yOffset,
-                           fontWidth*(spaces), fontHeight, m_pDiffTextWindow->colorGroup().highlight() );
+                           fontWidth*(spaces), fontHeight, m_pDiffTextWindow->tqcolorGroup().highlight() );
 
-               p.setPen( m_pDiffTextWindow->colorGroup().highlightedText() );
+               p.setPen( m_pDiffTextWindow->tqcolorGroup().highlightedText() );
                p.drawText( xOffset + fontWidth*outPos, yOffset + fontAscent, s );
 
                m_selection.bSelectionContainsData = true;
@@ -875,7 +875,7 @@ void DiffTextWindowData::writeLine(
       if( m_selection.lineWithin( line ) && m_selection.lineWithin( line+1 ) )
       {
          p.fillRect( xOffset + fontWidth*outPos, yOffset,
-                     deviceWidth, fontHeight, m_pDiffTextWindow->colorGroup().highlight() );
+                     deviceWidth, fontHeight, m_pDiffTextWindow->tqcolorGroup().highlight() );
       }
    }
 
@@ -1656,7 +1656,7 @@ void DiffTextWindowFrame::setFirstLine( int firstLine )
          s += " " + TQString::number( l+1 );
 
       d->m_pTopLine->setText( s );
-      d->m_pTopLine->repaint();
+      d->m_pTopLine->tqrepaint();
    }
 }
 
diff --git a/src/directorymergewindow.cpp b/src/directorymergewindow.cpp
index 9503c51..7565e20 100644
--- a/src/directorymergewindow.cpp
+++ b/src/directorymergewindow.cpp
@@ -28,11 +28,11 @@
 #include <kaction.h>
 #include <tqregexp.h>
 #include <tqmessagebox.h>
-#include <layout.h>
+#include <tqlayout.h>
 #include <tqlabel.h>
 #include <tqtable.h>
 #include <tqsplitter.h>
-#include <textedit.h>
+#include <tqtextedit.h>
 #include <tqprogressdialog.h>
 #include <kmessagebox.h>
 #include <kfiledialog.h>
@@ -187,13 +187,13 @@ void DirectoryMergeWindow::fastFileComparison(
    TempRemover tr1( fileName1, fi1 );
    if ( !tr1.success() )
    {
-      status = i18n("Creating temp copy of %1 failed.").arg(fileName1);
+      status = i18n("Creating temp copy of %1 failed.").tqarg(fileName1);
       return;
    }
    TempRemover tr2( fileName2, fi2 );
    if ( !tr2.success() )
    {
-      status = i18n("Creating temp copy of %1 failed.").arg(fileName2);
+      status = i18n("Creating temp copy of %1 failed.").tqarg(fileName2);
       return;
    }
 
@@ -204,7 +204,7 @@ void DirectoryMergeWindow::fastFileComparison(
 
    if ( ! file1.open(IO_ReadOnly) )
    {
-      status = i18n("Opening %1 failed.").arg(fileName1);
+      status = i18n("Opening %1 failed.").tqarg(fileName1);
       return;
    }
 
@@ -212,7 +212,7 @@ void DirectoryMergeWindow::fastFileComparison(
 
    if ( ! file2.open(IO_ReadOnly) )
    {
-      status = i18n("Opening %1 failed.").arg(fileName2);
+      status = i18n("Opening %1 failed.").tqarg(fileName2);
       return;
    }
 
@@ -230,13 +230,13 @@ void DirectoryMergeWindow::fastFileComparison(
       int len = min2( sizeLeft, (t_FileSize)buf1.size() );
       if( len != file1.readBlock( &buf1[0], len ) )
       {
-         status = i18n("Error reading from %1").arg(fileName1);
+         status = i18n("Error reading from %1").tqarg(fileName1);
          return;
       }
 
       if( len != file2.readBlock( &buf2[0], len ) )
       {
-         status = i18n("Error reading from %1").arg(fileName2);
+         status = i18n("Error reading from %1").tqarg(fileName2);
          return;
       }
 
@@ -387,7 +387,7 @@ static TQPixmap pixCombiner2( const TQPixmap* pm1, const TQPixmap* pm2 )
    return pix;
 }
 
-static void calcDirStatus( bool bThreeDirs, DirMergeItem* i, int& nofFiles,
+static void calcDirtqStatus( bool bThreeDirs, DirMergeItem* i, int& nofFiles,
                            int& nofDirs, int& nofEqualFiles, int& nofManualMerges )
 {
    if ( i->m_pMFI->m_bDirA || i->m_pMFI->m_bDirB || i->m_pMFI->m_bDirC )
@@ -408,7 +408,7 @@ static void calcDirStatus( bool bThreeDirs, DirMergeItem* i, int& nofFiles,
       }
    }
    for( TQListViewItem* p = i->firstChild();  p!=0; p = p->nextSibling() )
-      calcDirStatus( bThreeDirs, static_cast<DirMergeItem*>(p), nofFiles, nofDirs, nofEqualFiles, nofManualMerges );
+      calcDirtqStatus( bThreeDirs, static_cast<DirMergeItem*>(p), nofFiles, nofDirs, nofEqualFiles, nofManualMerges );
 }
 
 static TQString sortString(const TQString& s, bool bCaseSensitive)
@@ -507,13 +507,13 @@ bool DirectoryMergeWindow::init
        TQString text( i18n("Opening of directories failed:") );
        text += "\n\n";
        if ( !dirA.isDir() )
-       {  text += i18n("Dir A \"%1\" does not exist or is not a directory.\n").arg(m_dirA.prettyAbsPath()); }
+       {  text += i18n("Dir A \"%1\" does not exist or is not a directory.\n").tqarg(m_dirA.prettyAbsPath()); }
 
        if ( !dirB.isDir() )
-       {  text += i18n("Dir B \"%1\" does not exist or is not a directory.\n").arg(m_dirB.prettyAbsPath()); }
+       {  text += i18n("Dir B \"%1\" does not exist or is not a directory.\n").tqarg(m_dirB.prettyAbsPath()); }
 
        if ( m_dirC.isValid() && !m_dirC.isDir() )
-       {  text += i18n("Dir C \"%1\" does not exist or is not a directory.\n").arg(m_dirC.prettyAbsPath()); }
+       {  text += i18n("Dir C \"%1\" does not exist or is not a directory.\n").tqarg(m_dirC.prettyAbsPath()); }
 
        KMessageBox::sorry( this, text, i18n("Directory Open Error") );
        return false;
@@ -698,7 +698,7 @@ bool DirectoryMergeWindow::init
       int nofEqualFiles=0;
       int nofManualMerges=0;
       for( TQListViewItem* p = firstChild();  p!=0; p = p->nextSibling() )
-         calcDirStatus( m_dirC.isValid(), static_cast<DirMergeItem*>(p),
+         calcDirtqStatus( m_dirC.isValid(), static_cast<DirMergeItem*>(p),
                         nofFiles, nofDirs, nofEqualFiles, nofManualMerges );
 
       TQString s;
@@ -915,10 +915,10 @@ void DirectoryMergeWindow::compareFilesAndCalcAges( MergeFileInfos& mfi )
             mfi.m_bExistsInB ? mfi.m_fileInfoB.absFilePath() : TQString(""),
             mfi.m_bExistsInC ? mfi.m_fileInfoC.absFilePath() : TQString(""),
             "",
-            "","","",&mfi.m_totalDiffStatus
+            "","","",&mfi.m_totalDifftqStatus
             );
-         int nofNonwhiteConflicts = mfi.m_totalDiffStatus.nofUnsolvedConflicts + 
-            mfi.m_totalDiffStatus.nofSolvedConflicts - mfi.m_totalDiffStatus.nofWhitespaceConflicts;
+         int nofNonwhiteConflicts = mfi.m_totalDifftqStatus.nofUnsolvedConflicts + 
+            mfi.m_totalDifftqStatus.nofSolvedConflicts - mfi.m_totalDifftqStatus.nofWhitespaceConflicts;
 
          if (m_pOptions->m_bDmWhiteSpaceEqual && nofNonwhiteConflicts == 0)
          {
@@ -928,25 +928,25 @@ void DirectoryMergeWindow::compareFilesAndCalcAges( MergeFileInfos& mfi )
          }
          else
          {
-            mfi.m_bEqualAB = mfi.m_totalDiffStatus.bBinaryAEqB;
-            mfi.m_bEqualBC = mfi.m_totalDiffStatus.bBinaryBEqC;
-            mfi.m_bEqualAC = mfi.m_totalDiffStatus.bBinaryAEqC;
+            mfi.m_bEqualAB = mfi.m_totalDifftqStatus.bBinaryAEqB;
+            mfi.m_bEqualBC = mfi.m_totalDifftqStatus.bBinaryBEqC;
+            mfi.m_bEqualAC = mfi.m_totalDifftqStatus.bBinaryAEqC;
          }
       }
    }
    else
    {
       bool bError;
-      TQString eqStatus;
+      TQString eqtqStatus;
       if( mfi.m_bExistsInA && mfi.m_bExistsInB )
       {
          if( mfi.m_bDirA ) mfi.m_bEqualAB=true;
-         else fastFileComparison( mfi.m_fileInfoA, mfi.m_fileInfoB, mfi.m_bEqualAB, bError, eqStatus );
+         else fastFileComparison( mfi.m_fileInfoA, mfi.m_fileInfoB, mfi.m_bEqualAB, bError, eqtqStatus );
       }
       if( mfi.m_bExistsInA && mfi.m_bExistsInC )
       {
          if( mfi.m_bDirA ) mfi.m_bEqualAC=true;
-         else fastFileComparison( mfi.m_fileInfoA, mfi.m_fileInfoC, mfi.m_bEqualAC, bError, eqStatus );
+         else fastFileComparison( mfi.m_fileInfoA, mfi.m_fileInfoC, mfi.m_bEqualAC, bError, eqtqStatus );
       }
       if( mfi.m_bExistsInB && mfi.m_bExistsInC )
       {
@@ -955,7 +955,7 @@ void DirectoryMergeWindow::compareFilesAndCalcAges( MergeFileInfos& mfi )
          else
          {
             if( mfi.m_bDirB ) mfi.m_bEqualBC=true;
-            else fastFileComparison( mfi.m_fileInfoB, mfi.m_fileInfoC, mfi.m_bEqualBC, bError, eqStatus );
+            else fastFileComparison( mfi.m_fileInfoB, mfi.m_fileInfoC, mfi.m_bEqualBC, bError, eqtqStatus );
          }
       }
    }
@@ -1723,7 +1723,7 @@ void DirMergeItem::init(MergeFileInfos* pMFI)
 {
    pMFI->m_pDMI = this;
    m_pMFI = pMFI;
-   TotalDiffStatus& tds = pMFI->m_totalDiffStatus;
+   TotalDifftqStatus& tds = pMFI->m_totalDifftqStatus;
    if ( m_pMFI->m_bDirA || m_pMFI->m_bDirB || m_pMFI->m_bDirC )
    {
    }
@@ -2138,7 +2138,7 @@ void DirectoryMergeWindow::slotRunOperationForCurrentItem()
    if ( m_mergeItemList.empty() )
    {
       TQListViewItem* pBegin = currentItem();
-      TQListViewItem* pEnd = treeIterator(pBegin,false,false); // find next visible sibling (no children)
+      TQListViewItem* pEnd = treeIterator(pBegin,false,false); // find next visible sibling (no tqchildren)
 
       prepareMergeStart( pBegin, pEnd, bVerbose );
       mergeContinue(true, bVerbose);
@@ -2411,16 +2411,16 @@ bool DirectoryMergeWindow::deleteFLD( const TQString& name, bool bCreateBackup )
       bool bSuccess = renameFLD( name, name+".orig" );
       if (!bSuccess)
       {
-         m_pStatusInfo->addText( i18n("Error: While deleting %1: Creating backup failed.").arg(name) );
+         m_pStatusInfo->addText( i18n("Error: While deleting %1: Creating backup failed.").tqarg(name) );
          return false;
       }
    }
    else
    {
       if ( fi.isDir() && !fi.isSymLink() )
-         m_pStatusInfo->addText(i18n("delete directory recursively( %1 )").arg(name));
+         m_pStatusInfo->addText(i18n("delete directory recursively( %1 )").tqarg(name));
       else
-         m_pStatusInfo->addText(i18n("delete( %1 )").arg(name));
+         m_pStatusInfo->addText(i18n("delete( %1 )").tqarg(name));
 
       if ( m_bSimulatedMergeStarted )
       {
@@ -2454,7 +2454,7 @@ bool DirectoryMergeWindow::deleteFLD( const TQString& name, bool bCreateBackup )
             bSuccess = FileAccess::removeDir( name );
             if ( !bSuccess )
             {
-               m_pStatusInfo->addText( i18n("Error: rmdir( %1 ) operation failed.").arg(name));
+               m_pStatusInfo->addText( i18n("Error: rmdir( %1 ) operation failed.").tqarg(name));
                return false;
             }
          }
@@ -2490,7 +2490,7 @@ bool DirectoryMergeWindow::mergeFLD( const TQString& nameA,const TQString& nameB
          return false;
    }
 
-   m_pStatusInfo->addText(i18n("manual merge( %1, %2, %3 -> %4)").arg(nameA).arg(nameB).arg(nameC).arg(nameDest));
+   m_pStatusInfo->addText(i18n("manual merge( %1, %2, %3 -> %4)").tqarg(nameA).tqarg(nameB).tqarg(nameC).tqarg(nameDest));
    if ( m_bSimulatedMergeStarted )
    {
       m_pStatusInfo->addText(i18n("     Note: After a manual merge the user should continue by pressing F7.") );
@@ -2517,7 +2517,7 @@ bool DirectoryMergeWindow::copyFLD( const TQString& srcName, const TQString& des
       if ( !bSuccess )
       {
          m_pStatusInfo->addText(i18n("Error: copy( %1 -> %2 ) failed."
-            "Deleting existing destination failed.").arg(srcName).arg(destName));
+            "Deleting existing destination failed.").tqarg(srcName).tqarg(destName));
          return false;
       }
    }
@@ -2526,7 +2526,7 @@ bool DirectoryMergeWindow::copyFLD( const TQString& srcName, const TQString& des
 
    if ( fi.isSymLink() && (fi.isDir() && !m_bFollowDirLinks  ||  !fi.isDir() && !m_bFollowFileLinks) )
    {
-      m_pStatusInfo->addText(i18n("copyLink( %1 -> %2 )").arg(srcName).arg(destName));
+      m_pStatusInfo->addText(i18n("copyLink( %1 -> %2 )").tqarg(srcName).tqarg(destName));
 #ifdef _WIN32
       // What are links?
 #else
@@ -2563,7 +2563,7 @@ bool DirectoryMergeWindow::copyFLD( const TQString& srcName, const TQString& des
          return false;
    }
 
-   m_pStatusInfo->addText(i18n("copy( %1 -> %2 )").arg(srcName).arg(destName));
+   m_pStatusInfo->addText(i18n("copy( %1 -> %2 )").tqarg(srcName).tqarg(destName));
 
    if ( m_bSimulatedMergeStarted )
    {
@@ -2590,12 +2590,12 @@ bool DirectoryMergeWindow::renameFLD( const TQString& srcName, const TQString& d
       if (!bSuccess)
       {
          m_pStatusInfo->addText( i18n("Error during rename( %1 -> %2 ): "
-                             "Cannot delete existing destination." ).arg(srcName).arg(destName));
+                             "Cannot delete existing destination." ).tqarg(srcName).tqarg(destName));
          return false;
       }
    }
 
-   m_pStatusInfo->addText(i18n("rename( %1 -> %2 )").arg(srcName).arg(destName));
+   m_pStatusInfo->addText(i18n("rename( %1 -> %2 )").tqarg(srcName).tqarg(destName));
    if ( m_bSimulatedMergeStarted )
    {
       return true;
@@ -2623,7 +2623,7 @@ bool DirectoryMergeWindow::makeDir( const TQString& name, bool bQuiet )
       if (!bSuccess)
       {
          m_pStatusInfo->addText( i18n("Error during makeDir of %1. "
-                             "Cannot delete existing file." ).arg(name));
+                             "Cannot delete existing file." ).tqarg(name));
          return false;
       }
    }
@@ -2638,7 +2638,7 @@ bool DirectoryMergeWindow::makeDir( const TQString& name, bool bQuiet )
    }
 
    if ( ! bQuiet )
-      m_pStatusInfo->addText(i18n("makeDir( %1 )").arg(name));
+      m_pStatusInfo->addText(i18n("makeDir( %1 )").tqarg(name));
 
    if ( m_bSimulatedMergeStarted )
    {
@@ -2820,7 +2820,7 @@ TQTextStream& operator<<( TQTextStream& ts, MergeFileInfos& mfi )
    //FileAccess m_fileInfoB;
    //FileAccess m_fileInfoC;
 
-   //TotalDiffStatus m_totalDiffStatus;
+   //TotalDifftqStatus m_totalDifftqStatus;
    
    vm.save(ts);
    
diff --git a/src/directorymergewindow.h b/src/directorymergewindow.h
index 99c0405..25a66f7 100644
--- a/src/directorymergewindow.h
+++ b/src/directorymergewindow.h
@@ -26,7 +26,7 @@
 #include <map>
 #include "common.h"
 #include "fileaccess.h"
-#include "diff.h" //TotalDiffStatus
+#include "diff.h" //TotalDifftqStatus
 
 class OptionDialog;
 class KIconLoader;
@@ -37,7 +37,7 @@ class TQLabel;
 class KAction;
 class KToggleAction;
 class KActionCollection;
-class TotalDiffStatus;
+class TotalDifftqStatus;
 
 enum e_MergeOperation
 {
@@ -99,7 +99,7 @@ public:
    FileAccess m_fileInfoB;
    FileAccess m_fileInfoC;
 
-   TotalDiffStatus m_totalDiffStatus;   
+   TotalDifftqStatus m_totalDifftqStatus;   
 };
 
 class DirMergeItem : public TQListViewItem
@@ -319,7 +319,7 @@ protected:
    KAction* m_pDirSaveMergeState;
    KAction* m_pDirLoadMergeState;
 signals:
-   void startDiffMerge(TQString fn1,TQString fn2, TQString fn3, TQString ofn, TQString,TQString,TQString,TotalDiffStatus*);
+   void startDiffMerge(TQString fn1,TQString fn2, TQString fn3, TQString ofn, TQString,TQString,TQString,TotalDifftqStatus*);
    void checkIfCanContinue( bool* pbContinue );
    void updateAvailabilities();
    void statusBarMessage( const TQString& msg );
diff --git a/src/fileaccess.cpp b/src/fileaccess.cpp
index 0e106fc..c2be1dc 100644
--- a/src/fileaccess.cpp
+++ b/src/fileaccess.cpp
@@ -14,7 +14,7 @@
 #include <kio/global.h>
 #include <kmessagebox.h>
 #include "optiondialog.h"
-#include <layout.h>
+#include <tqlayout.h>
 #include <tqlabel.h>
 #include <tqapplication.h>
 #include <tqpushbutton.h>
@@ -25,7 +25,7 @@
 #include <ktempfile.h>
 #include <tqdir.h>
 #include <tqregexp.h>
-#include <textstream.h>
+#include <tqtextstream.h>
 #include <vector>
 #include <klocale.h>
 
@@ -407,11 +407,11 @@ bool FileAccess::writeFile( const void* pSrcBuffer, unsigned long length )
          if ( isExecutable() )  // value is true if the old file was executable
          {
             // Preserve attributes
-            struct stat srcFileStatus;
-            int statResult = ::stat( filePath().ascii(), &srcFileStatus );
+            struct stat srcFiletqStatus;
+            int statResult = ::stat( filePath().ascii(), &srcFiletqStatus );
             if (statResult==0)
             {
-               ::chmod ( filePath().ascii(), srcFileStatus.st_mode | S_IXUSR );
+               ::chmod ( filePath().ascii(), srcFiletqStatus.st_mode | S_IXUSR );
             }
          }
 #endif
@@ -625,7 +625,7 @@ bool FileAccessJobHandler::stat( int detail, bool bWantToWrite )
 
    connect( pStatJob, TQT_SIGNAL(result(KIO::Job*)), this, TQT_SLOT(slotStatResult(KIO::Job*)));
 
-   g_pProgressDialog->enterEventLoop( pStatJob, i18n("Getting file status: %1").arg(m_pFileAccess->prettyAbsPath()) );
+   g_pProgressDialog->enterEventLoop( pStatJob, i18n("Getting file status: %1").tqarg(m_pFileAccess->prettyAbsPath()) );
 
    return m_bSuccess;
 }
@@ -668,7 +668,7 @@ bool FileAccessJobHandler::get(void* pDestBuffer, long maxLength )
       connect( pJob, TQT_SIGNAL(data(KIO::Job*,const TQByteArray &)), this, TQT_SLOT(slotGetData(KIO::Job*, const TQByteArray&)));
       connect( pJob, TQT_SIGNAL(percent(KIO::Job*,unsigned long)), this, TQT_SLOT(slotPercent(KIO::Job*, unsigned long)));
 
-      g_pProgressDialog->enterEventLoop( pJob, i18n("Reading file: %1").arg(m_pFileAccess->prettyAbsPath()) );
+      g_pProgressDialog->enterEventLoop( pJob, i18n("Reading file: %1").tqarg(m_pFileAccess->prettyAbsPath()) );
       return m_bSuccess;
    }
    else
@@ -704,7 +704,7 @@ bool FileAccessJobHandler::put(const void* pSrcBuffer, long maxLength, bool bOve
       connect( pJob, TQT_SIGNAL(dataReq(KIO::Job*, TQByteArray&)), this, TQT_SLOT(slotPutData(KIO::Job*, TQByteArray&)));
       connect( pJob, TQT_SIGNAL(percent(KIO::Job*,unsigned long)), this, TQT_SLOT(slotPercent(KIO::Job*, unsigned long)));
 
-      g_pProgressDialog->enterEventLoop( pJob, i18n("Writing file: %1").arg(m_pFileAccess->prettyAbsPath()) );
+      g_pProgressDialog->enterEventLoop( pJob, i18n("Writing file: %1").tqarg(m_pFileAccess->prettyAbsPath()) );
       return m_bSuccess;
    }
    else
@@ -721,7 +721,7 @@ void FileAccessJobHandler::slotPutData( KIO::Job* pJob, TQByteArray& data )
    {
       long maxChunkSize = 100000;
       long length = min2( maxChunkSize, m_maxLength - m_transferredBytes );
-      bool bSuccess = data.resize( length );
+      bool bSuccess = data.tqresize( length );
       if ( bSuccess )
       {
          if ( length>0 )
@@ -767,7 +767,7 @@ bool FileAccessJobHandler::mkDir( const TQString& dirName )
       KIO::SimpleJob* pJob = KIO::mkdir( dirURL );
       connect( pJob, TQT_SIGNAL(result(KIO::Job*)), this, TQT_SLOT(slotSimpleJobResult(KIO::Job*)));
 
-      g_pProgressDialog->enterEventLoop( pJob, i18n("Making directory: %1").arg(dirName) );
+      g_pProgressDialog->enterEventLoop( pJob, i18n("Making directory: %1").tqarg(dirName) );
       return m_bSuccess;
    }
 }
@@ -787,7 +787,7 @@ bool FileAccessJobHandler::rmDir( const TQString& dirName )
       KIO::SimpleJob* pJob = KIO::rmdir( dirURL );
       connect( pJob, TQT_SIGNAL(result(KIO::Job*)), this, TQT_SLOT(slotSimpleJobResult(KIO::Job*)));
 
-      g_pProgressDialog->enterEventLoop(pJob, i18n("Removing directory: %1").arg(dirName));
+      g_pProgressDialog->enterEventLoop(pJob, i18n("Removing directory: %1").tqarg(dirName));
       return m_bSuccess;
    }
 }
@@ -802,7 +802,7 @@ bool FileAccessJobHandler::removeFile( const TQString& fileName )
       KIO::SimpleJob* pJob = KIO::file_delete( KURL::fromPathOrURL(fileName), false );
       connect( pJob, TQT_SIGNAL(result(KIO::Job*)), this, TQT_SLOT(slotSimpleJobResult(KIO::Job*)));
 
-      g_pProgressDialog->enterEventLoop( pJob, i18n("Removing file: %1").arg(fileName) );
+      g_pProgressDialog->enterEventLoop( pJob, i18n("Removing file: %1").tqarg(fileName) );
       return m_bSuccess;
    }
 }
@@ -818,7 +818,7 @@ bool FileAccessJobHandler::symLink( const TQString& linkTarget, const TQString&
       connect( pJob, TQT_SIGNAL(result(KIO::Job*)), this, TQT_SLOT(slotSimpleJobResult(KIO::Job*)));
 
       g_pProgressDialog->enterEventLoop( pJob,
-         i18n("Creating symbolic link: %1 -> %2").arg(linkLocation).arg(linkTarget) );
+         i18n("Creating symbolic link: %1 -> %2").tqarg(linkLocation).tqarg(linkTarget) );
       return m_bSuccess;
    }
 }
@@ -848,7 +848,7 @@ bool FileAccessJobHandler::rename( const TQString& dest )
       connect( pJob, TQT_SIGNAL(percent(KIO::Job*,unsigned long)), this, TQT_SLOT(slotPercent(KIO::Job*, unsigned long)));
 
       g_pProgressDialog->enterEventLoop( pJob,
-         i18n("Renaming file: %1 -> %2").arg(m_pFileAccess->prettyAbsPath()).arg(dest) );
+         i18n("Renaming file: %1 -> %2").tqarg(m_pFileAccess->prettyAbsPath()).tqarg(dest) );
       return m_bSuccess;
    }
 }
@@ -884,7 +884,7 @@ bool FileAccessJobHandler::copyFile( const TQString& dest )
       connect( pJob, TQT_SIGNAL(result(KIO::Job*)), this, TQT_SLOT(slotSimpleJobResult(KIO::Job*)));
       connect( pJob, TQT_SIGNAL(percent(KIO::Job*,unsigned long)), this, TQT_SLOT(slotPercent(KIO::Job*, unsigned long)));
       g_pProgressDialog->enterEventLoop( pJob,
-         i18n("Copying file: %1 -> %2").arg(m_pFileAccess->prettyAbsPath()).arg(dest) );
+         i18n("Copying file: %1 -> %2").tqarg(m_pFileAccess->prettyAbsPath()).tqarg(dest) );
 
       return m_bSuccess;
       // Note that the KIO-slave preserves the original date, if this is supported.
@@ -898,13 +898,13 @@ bool FileAccessJobHandler::copyFile( const TQString& dest )
    bool bReadSuccess = srcFile.open( IO_ReadOnly );
    if ( bReadSuccess == false )
    {
-      m_pFileAccess->m_statusText = i18n("Error during file copy operation: Opening file for reading failed. Filename: %1").arg(srcName);
+      m_pFileAccess->m_statusText = i18n("Error during file copy operation: Opening file for reading failed. Filename: %1").tqarg(srcName);
       return false;
    }
    bool bWriteSuccess = destFile.open( IO_WriteOnly );
    if ( bWriteSuccess == false )
    {
-      m_pFileAccess->m_statusText = i18n("Error during file copy operation: Opening file for writing failed. Filename: %1").arg(destName);
+      m_pFileAccess->m_statusText = i18n("Error during file copy operation: Opening file for writing failed. Filename: %1").tqarg(destName);
       return false;
    }
 
@@ -916,7 +916,7 @@ bool FileAccessJobHandler::copyFile( const TQString& dest )
       TQ_LONG readSize = srcFile.readBlock( &buffer[0], min2( srcSize, bufSize ) );
       if ( readSize==-1 || readSize==0 )
       {
-         m_pFileAccess->m_statusText = i18n("Error during file copy operation: Reading failed. Filename: %1").arg(srcName);
+         m_pFileAccess->m_statusText = i18n("Error during file copy operation: Reading failed. Filename: %1").tqarg(srcName);
          return false;
       }
       srcSize -= readSize;
@@ -925,7 +925,7 @@ bool FileAccessJobHandler::copyFile( const TQString& dest )
          TQ_LONG writeSize = destFile.writeBlock( &buffer[0], readSize );
          if ( writeSize==-1 || writeSize==0 )
          {
-            m_pFileAccess->m_statusText = i18n("Error during file copy operation: Writing failed. Filename: %1").arg(destName);
+            m_pFileAccess->m_statusText = i18n("Error during file copy operation: Writing failed. Filename: %1").tqarg(destName);
             return false;
          }
          readSize -= writeSize;
@@ -938,28 +938,28 @@ bool FileAccessJobHandler::copyFile( const TQString& dest )
 
    // Update the times of the destFile
 #ifdef _WIN32
-   struct _stat srcFileStatus;
-   int statResult = ::_stat( srcName.ascii(), &srcFileStatus );
+   struct _stat srcFiletqStatus;
+   int statResult = ::_stat( srcName.ascii(), &srcFiletqStatus );
    if (statResult==0)
    {
       _utimbuf destTimes;
-      destTimes.actime = srcFileStatus.st_atime;/* time of last access */
-      destTimes.modtime = srcFileStatus.st_mtime;/* time of last modification */
+      destTimes.actime = srcFiletqStatus.st_atime;/* time of last access */
+      destTimes.modtime = srcFiletqStatus.st_mtime;/* time of last modification */
 
       _utime ( destName.ascii(), &destTimes );
-      _chmod ( destName.ascii(), srcFileStatus.st_mode );
+      _chmod ( destName.ascii(), srcFiletqStatus.st_mode );
    }
 #else
-   struct stat srcFileStatus;
-   int statResult = ::stat( srcName.ascii(), &srcFileStatus );
+   struct stat srcFiletqStatus;
+   int statResult = ::stat( srcName.ascii(), &srcFiletqStatus );
    if (statResult==0)
    {
       utimbuf destTimes;
-      destTimes.actime = srcFileStatus.st_atime;/* time of last access */
-      destTimes.modtime = srcFileStatus.st_mtime;/* time of last modification */
+      destTimes.actime = srcFiletqStatus.st_atime;/* time of last access */
+      destTimes.modtime = srcFiletqStatus.st_mtime;/* time of last modification */
 
       utime ( destName.ascii(), &destTimes );
-      chmod ( destName.ascii(), srcFileStatus.st_mode );
+      chmod ( destName.ascii(), srcFiletqStatus.st_mode );
    }
 #endif
    return true;
@@ -1010,7 +1010,7 @@ void CvsIgnoreList::init( FileAccess& dir, bool bUseLocalCvsIgnore )
            ".nse_depinfo #* .#* cvslog.* ,* CVS CVS.adm .del-* *.a *.olb *.o *.obj "
            "*.so *.Z *~ *.old *.elc *.ln *.bak *.BAK *.orig *.rej *.exe _$* *$";
 
-   addEntriesFromString(TQString::fromLatin1(ignorestr));
+   addEntriesFromString(TQString::tqfromLatin1(ignorestr));
    addEntriesFromFile(TQDir::homeDirPath() + "/.cvsignore");
    addEntriesFromString(TQString::fromLocal8Bit(::getenv("CVSIGNORE")));
 
@@ -1032,7 +1032,7 @@ void CvsIgnoreList::init( FileAccess& dir, bool bUseLocalCvsIgnore )
                {
                   if (pos>pos1)
                   {
-                     addEntry( TQString::fromLatin1( &buf[pos1], pos-pos1 ) );
+                     addEntry( TQString::tqfromLatin1( &buf[pos1], pos-pos1 ) );
                   }
                   ++pos1;
                }
@@ -1088,7 +1088,7 @@ void CvsIgnoreList::addEntry(const TQString& pattern)
       unsigned int nofMetaCharacters = 0;
 
       const TQChar* pos;
-      pos = pattern.unicode();
+      pos = pattern.tqunicode();
       const TQChar* posEnd;
       posEnd=pos + pattern.length();
       while (pos < posEnd)
@@ -1344,7 +1344,7 @@ bool FileAccessJobHandler::listDir( t_DirectoryList* pDirList, bool bRecursive,
          //connect( pListJob, TQT_SIGNAL(percent(KIO::Job*,unsigned long)), this, TQT_SLOT(slotPercent(KIO::Job*, unsigned long)));
 
          g_pProgressDialog->enterEventLoop( pListJob,
-            i18n("Listing directory: %1").arg(m_pFileAccess->prettyAbsPath()) );
+            i18n("Listing directory: %1").tqarg(m_pFileAccess->prettyAbsPath()) );
       }
    }
 
@@ -1454,27 +1454,27 @@ ProgressDialog::ProgressDialog( TQWidget* pParent )
 : TQDialog( pParent, 0, true )
 {
    m_bStayHidden = false;
-   TQVBoxLayout* layout = new TQVBoxLayout(this);
+   TQVBoxLayout* tqlayout = new TQVBoxLayout(this);
 
    m_pInformation = new TQLabel( " ", this );
-   layout->addWidget( m_pInformation );
+   tqlayout->addWidget( m_pInformation );
 
    m_pProgressBar = new KProgress(1000, this);
-   layout->addWidget( m_pProgressBar );
+   tqlayout->addWidget( m_pProgressBar );
 
    m_pSubInformation = new TQLabel( " ", this);
-   layout->addWidget( m_pSubInformation );
+   tqlayout->addWidget( m_pSubInformation );
 
    m_pSubProgressBar = new KProgress(1000, this);
-   layout->addWidget( m_pSubProgressBar );
+   tqlayout->addWidget( m_pSubProgressBar );
 
    m_pSlowJobInfo = new TQLabel( " ", this);
-   layout->addWidget( m_pSlowJobInfo );
+   tqlayout->addWidget( m_pSlowJobInfo );
 
-   TQHBoxLayout* hlayout = new TQHBoxLayout( layout );
-   hlayout->addStretch(1);
+   TQHBoxLayout* htqlayout = new TQHBoxLayout( tqlayout );
+   htqlayout->addStretch(1);
    m_pAbortButton = new TQPushButton( i18n("&Cancel"), this);
-   hlayout->addWidget( m_pAbortButton );
+   htqlayout->addWidget( m_pAbortButton );
    connect( m_pAbortButton, TQT_SIGNAL(clicked()), this, TQT_SLOT(slotAbort()) );
 
    m_progressDelayTimer = 0;
diff --git a/src/gnudiff_diff.h b/src/gnudiff_diff.h
index 482435c..7bc8b92 100644
--- a/src/gnudiff_diff.h
+++ b/src/gnudiff_diff.h
@@ -110,7 +110,7 @@ bool brief;
 bool expand_tabs;
 
 /* Use a tab in the output, rather than a space, before the text of an
-   input line, so as to keep the proper alignment in the input line
+   input line, so as to keep the proper tqalignment in the input line
    without changing the characters in it (-T).  */
 bool initial_tab;
 
diff --git a/src/gnudiff_io.cpp b/src/gnudiff_io.cpp
index aab645f..f29fd31 100644
--- a/src/gnudiff_io.cpp
+++ b/src/gnudiff_io.cpp
@@ -169,7 +169,7 @@ void GnuDiff::find_and_hash_each_line (struct file_data *current)
 	    while ( p<bufend && (c = *p) != '\n' )
             {
 	      if (! (isWhite(c) || bIgnoreNumbers && (c.isDigit() || c=='-' || c=='.' ) ))
-                  h = HASH (h, c.lower().unicode());
+                  h = HASH (h, c.lower().tqunicode());
               ++p;
             }            
 	    break;
@@ -177,7 +177,7 @@ void GnuDiff::find_and_hash_each_line (struct file_data *current)
 	  default:
 	    while ( p<bufend && (c = *p) != '\n' )
             {
-               h = HASH (h, c.lower().unicode());
+               h = HASH (h, c.lower().tqunicode());
                ++p;
             }
 	    break;
@@ -189,7 +189,7 @@ void GnuDiff::find_and_hash_each_line (struct file_data *current)
 	    while ( p<bufend && (c = *p) != '\n')
             {
 	      if (! (isWhite(c)|| bIgnoreNumbers && (c.isDigit() || c=='-' || c=='.' ) ))
-                 h = HASH (h, c.unicode());
+                 h = HASH (h, c.tqunicode());
               ++p;
             }
 	    break;
@@ -197,7 +197,7 @@ void GnuDiff::find_and_hash_each_line (struct file_data *current)
 	  default:
 	    while ( p<bufend && (c = *p) != '\n')
             {
-               h = HASH (h, c.unicode());
+               h = HASH (h, c.tqunicode());
                ++p;
             }
 	    break;
diff --git a/src/kdiff3.cpp b/src/kdiff3.cpp
index e8b5add..c3541ec 100644
--- a/src/kdiff3.cpp
+++ b/src/kdiff3.cpp
@@ -30,8 +30,8 @@
 #include <tqpushbutton.h>
 #include <tqpopupmenu.h>
 #include <tqlabel.h>
-#include <textedit.h>
-#include <layout.h>
+#include <tqtextedit.h>
+#include <tqlayout.h>
 #include <tqpaintdevicemetrics.h>
 
 // include files for KDE
@@ -259,7 +259,7 @@ KDiff3App::KDiff3App(TQWidget* pParent, const char* name, KDiff3Part* pKDiff3Par
       slotViewStatusBar();
       if( toolBar("mainToolBar")!=0 )
          toolBar("mainToolBar")->setBarPos( (KToolBar::BarPosition) m_pOptionDialog->m_toolBarPos );
-/*      TQSize size = m_pOptionDialog->m_geometry;
+/*      TQSize size = m_pOptionDialog->m_tqgeometry;
       TQPoint pos = m_pOptionDialog->m_position;
       if(!size.isEmpty())
       {
@@ -280,8 +280,8 @@ KDiff3App::KDiff3App(TQWidget* pParent, const char* name, KDiff3Part* pKDiff3Par
       KApplication::kApplication()->iconLoader() );
    m_pDirectoryMergeInfo = new DirectoryMergeInfo( m_pDirectoryMergeSplitter );
    m_pDirectoryMergeWindow->setDirectoryMergeInfo( m_pDirectoryMergeInfo );
-   connect( m_pDirectoryMergeWindow, TQT_SIGNAL(startDiffMerge(TQString,TQString,TQString,TQString,TQString,TQString,TQString,TotalDiffStatus*)),
-            TQT_TQOBJECT(this), TQT_SLOT( slotFileOpen2(TQString,TQString,TQString,TQString,TQString,TQString,TQString,TotalDiffStatus*)));
+   connect( m_pDirectoryMergeWindow, TQT_SIGNAL(startDiffMerge(TQString,TQString,TQString,TQString,TQString,TQString,TQString,TotalDifftqStatus*)),
+            TQT_TQOBJECT(this), TQT_SLOT( slotFileOpen2(TQString,TQString,TQString,TQString,TQString,TQString,TQString,TotalDifftqStatus*)));
    connect( m_pDirectoryMergeWindow, TQT_SIGNAL(selectionChanged()), TQT_TQOBJECT(this), TQT_SLOT(slotUpdateAvailabilities()));
    connect( m_pDirectoryMergeWindow, TQT_SIGNAL(currentChanged(TQListViewItem*)), TQT_TQOBJECT(this), TQT_SLOT(slotUpdateAvailabilities()));
    connect( m_pDirectoryMergeWindow, TQT_SIGNAL(checkIfCanContinue(bool*)), TQT_TQOBJECT(this), TQT_SLOT(slotCheckIfCanContinue(bool*)));
@@ -303,7 +303,7 @@ void KDiff3App::completeInit( const TQString& fn1, const TQString& fn2, const TQ
 {
    if (m_pKDiff3Shell!=0)
    {
-      TQSize size=m_pOptionDialog->m_geometry;
+      TQSize size=m_pOptionDialog->m_tqgeometry;
       TQPoint pos=m_pOptionDialog->m_position;
       if(!size.isEmpty())
       {
@@ -341,13 +341,13 @@ void KDiff3App::completeInit( const TQString& fn1, const TQString& fn2, const TQ
          SourceData* pSD=0;
          if ( m_sd3.isEmpty() )
          {
-            if ( m_totalDiffStatus.bBinaryAEqB ){ pSD = &m_sd1; }
+            if ( m_totalDifftqStatus.bBinaryAEqB ){ pSD = &m_sd1; }
          }
          else
          {
-            if      ( m_totalDiffStatus.bBinaryBEqC ){ pSD = &m_sd3; } // B==C (assume A is old)
-            else if ( m_totalDiffStatus.bBinaryAEqB ){ pSD = &m_sd3; } // assuming C has changed
-            else if ( m_totalDiffStatus.bBinaryAEqC ){ pSD = &m_sd2; } // assuming B has changed
+            if      ( m_totalDifftqStatus.bBinaryBEqC ){ pSD = &m_sd3; } // B==C (assume A is old)
+            else if ( m_totalDifftqStatus.bBinaryAEqB ){ pSD = &m_sd3; } // assuming C has changed
+            else if ( m_totalDifftqStatus.bBinaryAEqC ){ pSD = &m_sd2; } // assuming B has changed
          }
 
          if ( pSD!=0 )
@@ -577,7 +577,7 @@ void KDiff3App::saveOptions( KConfig* config )
          m_pOptionDialog->m_bMaximised = m_pKDiff3Shell->isMaximized();
          if( ! m_pKDiff3Shell->isMaximized() && m_pKDiff3Shell->isVisible() )
          {
-            m_pOptionDialog->m_geometry = m_pKDiff3Shell->size();
+            m_pOptionDialog->m_tqgeometry = m_pKDiff3Shell->size();
             m_pOptionDialog->m_position = m_pKDiff3Shell->pos();
          }
          if ( toolBar("mainToolBar")!=0 )
diff --git a/src/kdiff3.h b/src/kdiff3.h
index 46c0d3c..f5e240f 100644
--- a/src/kdiff3.h
+++ b/src/kdiff3.h
@@ -110,7 +110,7 @@ class KDiff3App : public TQSplitter
     /** initializes the KActions of the application */
     void initActions( KActionCollection* );
 
-    /** save general Options like all bar positions and status as well as the geometry
+    /** save general Options like all bar positions and status as well as the tqgeometry
         and the recent file list to the configuration file */
     void saveOptions( KConfig* );
 
@@ -144,7 +144,7 @@ class KDiff3App : public TQSplitter
     /** open a file and load it into the document*/
     void slotFileOpen();
     void slotFileOpen2( TQString fn1, TQString fn2, TQString fn3, TQString ofn,
-                        TQString an1, TQString an2, TQString an3, TotalDiffStatus* pTotalDiffStatus );
+                        TQString an1, TQString an2, TQString an3, TotalDifftqStatus* pTotalDifftqStatus );
 
     void slotFileNameChanged(const TQString& fileName, int winIdx);
 
@@ -281,7 +281,7 @@ class KDiff3App : public TQSplitter
 
     TQWidget* m_pCornerWidget;
 
-    TotalDiffStatus m_totalDiffStatus;
+    TotalDifftqStatus m_totalDifftqStatus;
 
     SourceData m_sd1;
     SourceData m_sd2;
@@ -310,7 +310,7 @@ class KDiff3App : public TQSplitter
    OptionDialog* m_pOptionDialog;
    FindDialog*   m_pFindDialog;
 
-   void init( bool bAuto=false, TotalDiffStatus* pTotalDiffStatus=0, bool bLoadFiles=true );
+   void init( bool bAuto=false, TotalDifftqStatus* pTotalDifftqStatus=0, bool bLoadFiles=true );
 
    virtual bool eventFilter( TQObject* o, TQEvent* e );
    virtual void resizeEvent(TQResizeEvent*);
diff --git a/src/kdiff3_part.cpp b/src/kdiff3_part.cpp
index a0ea1ad..406c3df 100644
--- a/src/kdiff3_part.cpp
+++ b/src/kdiff3_part.cpp
@@ -25,7 +25,7 @@
 #include <kfiledialog.h>
 
 #include <tqfile.h>
-#include <textstream.h>
+#include <tqtextstream.h>
 #include "kdiff3.h"
 #include "fileaccess.h"
 
diff --git a/src/kreplacements/kreplacements.cpp b/src/kreplacements/kreplacements.cpp
index f8948e1..75894a1 100644
--- a/src/kreplacements/kreplacements.cpp
+++ b/src/kreplacements/kreplacements.cpp
@@ -29,9 +29,9 @@
 #include <tqcolordialog.h>
 #include <tqfontdialog.h>
 #include <tqlabel.h>
-#include <textbrowser.h>
-#include <textstream.h>
-#include <layout.h>
+#include <tqtextbrowser.h>
+#include <tqtextstream.h>
+#include <tqlayout.h>
 #include <tqdockarea.h>
 
 #include <vector>
@@ -676,7 +676,7 @@ KToggleAction* KStdAction::showStatusbar( TQWidget* parent, const char* slot, KA
 KAction* KStdAction::preferences( TQWidget* parent, const char* slot, KActionCollection* actionCollection)
 {
    KMainWindow* p = actionCollection->m_pMainWindow;
-   KAction* a = new KAction( i18n("&Configure %1...").arg("KDiff3"), 0, parent, slot, actionCollection, "settings", false, false );
+   KAction* a = new KAction( i18n("&Configure %1...").tqarg("KDiff3"), 0, parent, slot, actionCollection, "settings", false, false );
    if(p) a->addTo( p->settingsMenu );
    return a;
 }
diff --git a/src/main.cpp b/src/main.cpp
index 858e47a..2556c0e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -21,9 +21,9 @@
 #include "kdiff3_shell.h"
 #include <kstandarddirs.h>
 #include "version.h"
-#include <textcodec.h>
+#include <tqtextcodec.h>
 #include <tqfile.h>
-#include <textstream.h>
+#include <tqtextstream.h>
 #include <vector>
 
 #ifdef KREPLACEMENTS_H
diff --git a/src/mergeresultwindow.cpp b/src/mergeresultwindow.cpp
index 88bfd4d..119294f 100644
--- a/src/mergeresultwindow.cpp
+++ b/src/mergeresultwindow.cpp
@@ -20,7 +20,7 @@
 
 #include <tqpainter.h>
 #include <tqapplication.h>
-#include <clipboard.h>
+#include <tqclipboard.h>
 #include <tqdir.h>
 #include <tqfile.h>
 #include <tqcursor.h>
@@ -30,8 +30,8 @@
 #include <tqlabel.h>
 #include <tqlineedit.h>
 #include <tqcombobox.h>
-#include <layout.h>
-#include <textcodec.h>
+#include <tqlayout.h>
+#include <tqtextcodec.h>
 #include <tqdragobject.h>
 
 #include <klocale.h>
@@ -72,7 +72,7 @@ MergeResultWindow::MergeResultWindow(
    m_sizeC = 0;
 
    m_pDiff3LineList = 0;
-   m_pTotalDiffStatus = 0;
+   m_pTotalDifftqStatus = 0;
    m_pStatusBar = pStatusBar;
 
    m_pOptionDialog = pOptionDialog;
@@ -97,7 +97,7 @@ void MergeResultWindow::init(
    const LineData* pLineDataB, int sizeB,
    const LineData* pLineDataC, int sizeC,
    const Diff3LineList* pDiff3LineList,
-   TotalDiffStatus* pTotalDiffStatus
+   TotalDifftqStatus* pTotalDifftqStatus
    )
 {
    m_firstLine = 0;
@@ -118,7 +118,7 @@ void MergeResultWindow::init(
    m_sizeC = sizeC;
 
    m_pDiff3LineList = pDiff3LineList;
-   m_pTotalDiffStatus = pTotalDiffStatus;
+   m_pTotalDifftqStatus = pTotalDifftqStatus;
    
    m_selection.reset();
    m_cursorXPos=0;
@@ -134,13 +134,13 @@ void MergeResultWindow::init(
    int nofUnsolved = getNrOfUnsolvedConflicts(&wsc);
    if (m_pStatusBar)
       m_pStatusBar->message( i18n("Number of remaining unsolved conflicts: %1 (of which %2 are whitespace)")
-         .arg(nofUnsolved).arg(wsc) );
+         .tqarg(nofUnsolved).tqarg(wsc) );
 }
 
 void MergeResultWindow::reset()
 {
    m_pDiff3LineList = 0;
-   m_pTotalDiffStatus = 0;
+   m_pTotalDifftqStatus = 0;
    m_pldA = 0;
    m_pldB = 0;
    m_pldC = 0;
@@ -467,9 +467,9 @@ void MergeResultWindow::merge(bool bAutoSolve, int defaultSelector, bool bConfli
          ++nrOfWhiteSpaceConflicts;
    }
 
-   m_pTotalDiffStatus->nofUnsolvedConflicts = nrOfUnsolvedConflicts;
-   m_pTotalDiffStatus->nofSolvedConflicts = nrOfSolvedConflicts;
-   m_pTotalDiffStatus->nofWhitespaceConflicts = nrOfWhiteSpaceConflicts;
+   m_pTotalDifftqStatus->nofUnsolvedConflicts = nrOfUnsolvedConflicts;
+   m_pTotalDifftqStatus->nofSolvedConflicts = nrOfSolvedConflicts;
+   m_pTotalDifftqStatus->nofWhitespaceConflicts = nrOfWhiteSpaceConflicts;
 
 
    m_cursorXPos=0;
@@ -804,17 +804,17 @@ void MergeResultWindow::showNrOfConflicts()
          ++nrOfConflicts;
    }
    TQString totalInfo;
-   if ( m_pTotalDiffStatus->bBinaryAEqB && m_pTotalDiffStatus->bBinaryAEqC )
+   if ( m_pTotalDifftqStatus->bBinaryAEqB && m_pTotalDifftqStatus->bBinaryAEqC )
       totalInfo += i18n("All input files are binary equal.");
-   else  if ( m_pTotalDiffStatus->bTextAEqB && m_pTotalDiffStatus->bTextAEqC )
+   else  if ( m_pTotalDifftqStatus->bTextAEqB && m_pTotalDifftqStatus->bTextAEqC )
       totalInfo += i18n("All input files contain the same text.");
    else {
-      if    ( m_pTotalDiffStatus->bBinaryAEqB ) totalInfo += i18n("Files %1 and %2 are binary equal.\n").arg("A").arg("B");
-      else if ( m_pTotalDiffStatus->bTextAEqB ) totalInfo += i18n("Files %1 and %2 have equal text.\n").arg("A").arg("B");
-      if    ( m_pTotalDiffStatus->bBinaryAEqC ) totalInfo += i18n("Files %1 and %2 are binary equal.\n").arg("A").arg("C");
-      else if ( m_pTotalDiffStatus->bTextAEqC ) totalInfo += i18n("Files %1 and %2 have equal text.\n").arg("A").arg("C");
-      if    ( m_pTotalDiffStatus->bBinaryBEqC ) totalInfo += i18n("Files %1 and %2 are binary equal.\n").arg("B").arg("C");
-      else if ( m_pTotalDiffStatus->bTextBEqC ) totalInfo += i18n("Files %1 and %2 have equal text.\n").arg("B").arg("C");
+      if    ( m_pTotalDifftqStatus->bBinaryAEqB ) totalInfo += i18n("Files %1 and %2 are binary equal.\n").tqarg("A").tqarg("B");
+      else if ( m_pTotalDifftqStatus->bTextAEqB ) totalInfo += i18n("Files %1 and %2 have equal text.\n").tqarg("A").tqarg("B");
+      if    ( m_pTotalDifftqStatus->bBinaryAEqC ) totalInfo += i18n("Files %1 and %2 are binary equal.\n").tqarg("A").tqarg("C");
+      else if ( m_pTotalDifftqStatus->bTextAEqC ) totalInfo += i18n("Files %1 and %2 have equal text.\n").tqarg("A").tqarg("C");
+      if    ( m_pTotalDifftqStatus->bBinaryBEqC ) totalInfo += i18n("Files %1 and %2 are binary equal.\n").tqarg("B").tqarg("C");
+      else if ( m_pTotalDifftqStatus->bTextBEqC ) totalInfo += i18n("Files %1 and %2 have equal text.\n").tqarg("B").tqarg("C");
    }
 
    int nrOfUnsolvedConflicts = getNrOfUnsolvedConflicts();
@@ -948,7 +948,7 @@ void MergeResultWindow::choose( int selector )
    int wsc;
    int nofUnsolved = getNrOfUnsolvedConflicts(&wsc);
    m_pStatusBar->message( i18n("Number of remaining unsolved conflicts: %1 (of which %2 are whitespace)")
-         .arg(nofUnsolved).arg(wsc) );
+         .tqarg(nofUnsolved).tqarg(wsc) );
 }
 
 // bConflictsOnly: automatically choose for conflicts only (true) or for everywhere (false)
@@ -962,7 +962,7 @@ void MergeResultWindow::chooseGlobal(int selector, bool bConflictsOnly, bool bWh
    int wsc;
    int nofUnsolved = getNrOfUnsolvedConflicts(&wsc);
    m_pStatusBar->message( i18n("Number of remaining unsolved conflicts: %1 (of which %2 are whitespace)")
-         .arg(nofUnsolved).arg(wsc) );
+         .tqarg(nofUnsolved).tqarg(wsc) );
 }
 
 void MergeResultWindow::slotAutoSolve()
@@ -974,7 +974,7 @@ void MergeResultWindow::slotAutoSolve()
    int wsc;
    int nofUnsolved = getNrOfUnsolvedConflicts(&wsc);
    m_pStatusBar->message( i18n("Number of remaining unsolved conflicts: %1 (of which %2 are whitespace)")
-         .arg(nofUnsolved).arg(wsc) );
+         .tqarg(nofUnsolved).tqarg(wsc) );
 }
 
 void MergeResultWindow::slotUnsolve()
@@ -986,7 +986,7 @@ void MergeResultWindow::slotUnsolve()
    int wsc;
    int nofUnsolved = getNrOfUnsolvedConflicts(&wsc);
    m_pStatusBar->message( i18n("Number of remaining unsolved conflicts: %1 (of which %2 are whitespace)")
-         .arg(nofUnsolved).arg(wsc) );
+         .tqarg(nofUnsolved).tqarg(wsc) );
 }
 
 static TQString calcHistoryLead(const TQString& s )
@@ -1661,12 +1661,12 @@ void MergeResultWindow::writeLine(
 
          if( m_selection.lineWithin( line+1 ) )
             p.fillRect( xOffset + fontWidth*(firstPosInLine2-m_firstColumn), yOffset,
-               width(), fontHeight, colorGroup().highlight() );
+               width(), fontHeight, tqcolorGroup().highlight() );
          else if ( lengthInLine2>0 )
             p.fillRect( xOffset + fontWidth*(firstPosInLine2-m_firstColumn), yOffset,
-               fontWidth*lengthInLine2, fontHeight, colorGroup().highlight() );
+               fontWidth*lengthInLine2, fontHeight, tqcolorGroup().highlight() );
 
-         p.setPen( colorGroup().highlightedText() );
+         p.setPen( tqcolorGroup().highlightedText() );
          p.drawText( xOffset + fontWidth*(firstPosInLine2-m_firstColumn), yOffset+fontAscent,
             s.mid(firstPosInLine2,lengthInLine2), true );
       }
@@ -2105,9 +2105,9 @@ void MergeResultWindow::slotCursorUpdate()
       int xCursor = ( m_cursorXPos - m_firstColumn ) * fontWidth + xOffset;
 
       if (!m_pOptionDialog->m_bRightToLeftLanguage)
-         repaint( xCursor-2, yOffset, 5, fm.ascent()+2 );
+         tqrepaint( xCursor-2, yOffset, 5, fm.ascent()+2 );
       else
-         repaint( width()-1-4-(xCursor-2), yOffset, 5, fm.ascent()+2 );
+         tqrepaint( width()-1-4-(xCursor-2), yOffset, 5, fm.ascent()+2 );
 
       m_bCursorUpdate=false;
    }
@@ -2613,10 +2613,10 @@ void MergeResultWindow::pasteClipboard( bool bFromSelection )
    TQString str = melIt->getString( this );
    int x = convertToPosInText( str, m_cursorXPos, m_pOptionDialog->m_tabSize );
 
-   if ( !TQApplication::clipboard()->supportsSelection() )
+   if ( !TQApplication::tqclipboard()->supportsSelection() )
       bFromSelection = false;
 
-   TQString clipBoard = TQApplication::clipboard()->text( bFromSelection ? TQClipboard::Selection : TQClipboard::Clipboard );
+   TQString clipBoard = TQApplication::tqclipboard()->text( bFromSelection ? TQClipboard::Selection : TQClipboard::Clipboard );
 
    TQString currentLine = str.left(x);
    TQString endOfLine = str.mid(x);
@@ -3072,7 +3072,7 @@ WindowTitleWidget::WindowTitleWidget(OptionDialog* pOptionDialog, TQWidget* pPar
 
    m_pModifiedLabel = new TQLabel(i18n("[Modified]"),this);
    pHLayout->addWidget( m_pModifiedLabel );
-   m_pModifiedLabel->setMinimumSize( m_pModifiedLabel->sizeHint() );
+   m_pModifiedLabel->setMinimumSize( m_pModifiedLabel->tqsizeHint() );
    m_pModifiedLabel->setText("");
 
    pHLayout->addStretch(1);
@@ -3137,7 +3137,7 @@ void WindowTitleWidget::setEncodings( TQTextCodec* pCodecForA, TQTextCodec* pCod
       m_codecMap[i]=it->second;
       ++i;
    }
-   m_pEncodingSelector->setMinimumSize( m_pEncodingSelector->sizeHint() );
+   m_pEncodingSelector->setMinimumSize( m_pEncodingSelector->tqsizeHint() );
 
    if ( pCodecForC && pCodecForB && pCodecForA )
    {
diff --git a/src/mergeresultwindow.h b/src/mergeresultwindow.h
index 2b61e6f..ed524a5 100644
--- a/src/mergeresultwindow.h
+++ b/src/mergeresultwindow.h
@@ -110,7 +110,7 @@ public:
       const LineData* pLineDataB, int sizeB,
       const LineData* pLineDataC, int sizeC,
       const Diff3LineList* pDiff3LineList,
-      TotalDiffStatus* pTotalDiffStatus
+      TotalDifftqStatus* pTotalDifftqStatus
       );
 
    void reset();
@@ -187,7 +187,7 @@ private:
    int m_sizeC;
 
    const Diff3LineList* m_pDiff3LineList;
-   TotalDiffStatus* m_pTotalDiffStatus;
+   TotalDifftqStatus* m_pTotalDifftqStatus;
 
    bool m_bPaintingAllowed;
    int m_delayedDrawTimer;
diff --git a/src/optiondialog.cpp b/src/optiondialog.cpp
index 3f0ebf7..9b46a6d 100644
--- a/src/optiondialog.cpp
+++ b/src/optiondialog.cpp
@@ -22,13 +22,13 @@
 #include <tqcombobox.h>
 #include <tqfont.h>
 #include <tqframe.h>
-#include <layout.h>
+#include <tqlayout.h>
 #include <tqlabel.h>
 #include <tqlineedit.h> 
 #include <tqvbox.h>
 #include <tqvalidator.h>
 #include <tqtooltip.h>
-#include <textcodec.h>
+#include <tqtextcodec.h>
 #include <tqradiobutton.h>
 #include <tqvbuttongroup.h>
 #include <tqsettings.h>
@@ -495,7 +495,7 @@ void OptionDialog::setupOtherOptions()
    new OptionToggleAction( true,  "Show Statusbar", &m_bShowStatusBar, this );
 
    new OptionNum( (int)KToolBar::Top, "ToolBarPos", &m_toolBarPos, this );
-   new OptionSize( TQSize(600,400),"Geometry", &m_geometry, this );
+   new OptionSize( TQSize(600,400),"Geometry", &m_tqgeometry, this );
    new OptionPoint( TQPoint(0,22), "Position", &m_position, this );
    new OptionToggleAction( false, "WindowStateMaximised", &m_bMaximised, this );
 
diff --git a/src/optiondialog.h b/src/optiondialog.h
index b7a27e6..697dfe3 100644
--- a/src/optiondialog.h
+++ b/src/optiondialog.h
@@ -59,7 +59,7 @@ public:
     TQString calcOptionHelp();
 
     // Some settings are not available in the option dialog:
-    TQSize  m_geometry;
+    TQSize  m_tqgeometry;
     TQPoint m_position;
     bool   m_bMaximised; 
     bool   m_bShowToolBar;
diff --git a/src/pdiff.cpp b/src/pdiff.cpp
index ed1419e..033fd31 100644
--- a/src/pdiff.cpp
+++ b/src/pdiff.cpp
@@ -31,9 +31,9 @@
 #include <kstatusbar.h>
 #include <kkeydialog.h>
 
-#include <clipboard.h>
+#include <tqclipboard.h>
 #include <tqscrollbar.h>
-#include <layout.h>
+#include <tqlayout.h>
 #include <tqcheckbox.h>
 #include <tqsplitter.h>
 #include <tqdir.h>
@@ -235,14 +235,14 @@ bool KDiff3App::runDiff( const LineData* p1, int size1, const LineData* p2, int
    return true;
 }
 
-void KDiff3App::init( bool bAuto, TotalDiffStatus* pTotalDiffStatus, bool bLoadFiles )
+void KDiff3App::init( bool bAuto, TotalDifftqStatus* pTotalDifftqStatus, bool bLoadFiles )
 {
    ProgressProxy pp;
    // When doing a full analysis in the directory-comparison, then the statistics-results
-   // will be stored in the given TotalDiffStatus. Otherwise it will be 0.
-   bool bGUI = pTotalDiffStatus == 0;
-   if (pTotalDiffStatus==0) 
-      pTotalDiffStatus = &m_totalDiffStatus;
+   // will be stored in the given TotalDifftqStatus. Otherwise it will be 0.
+   bool bGUI = pTotalDifftqStatus == 0;
+   if (pTotalDifftqStatus==0) 
+      pTotalDifftqStatus = &m_totalDifftqStatus;
 
    bool bPreserveCarriageReturn = m_pOptionDialog->m_bPreserveCarriageReturn;
 
@@ -310,11 +310,11 @@ void KDiff3App::init( bool bAuto, TotalDiffStatus* pTotalDiffStatus, bool bLoadF
          pp.setMaxNofSteps( 6 );  // 3 comparisons, 3 finediffs
    }
 
-   pTotalDiffStatus->reset();
+   pTotalDifftqStatus->reset();
    // Run the diff.
    if ( m_sd3.isEmpty() )
    {
-      pTotalDiffStatus->bBinaryAEqB = m_sd1.isBinaryEqualWith( m_sd2 );
+      pTotalDifftqStatus->bBinaryAEqB = m_sd1.isBinaryEqualWith( m_sd2 );
       pp.setInformation(i18n("Diff: A <-> B"));
 
       runDiff( m_sd1.getLineDataForDiff(), m_sd1.getSizeLines(), m_sd2.getLineDataForDiff(), m_sd2.getSizeLines(), m_diffList12,1,2 );
@@ -323,8 +323,8 @@ void KDiff3App::init( bool bAuto, TotalDiffStatus* pTotalDiffStatus, bool bLoadF
 
       pp.setInformation(i18n("Linediff: A <-> B"));
       calcDiff3LineListUsingAB( &m_diffList12, m_diff3LineList );
-      fineDiff( m_diff3LineList, 1, m_sd1.getLineDataForDisplay(), m_sd2.getLineDataForDisplay(), pTotalDiffStatus->bTextAEqB );
-      if ( m_sd1.getSizeBytes()==0 ) pTotalDiffStatus->bTextAEqB=false;
+      fineDiff( m_diff3LineList, 1, m_sd1.getLineDataForDisplay(), m_sd2.getLineDataForDisplay(), pTotalDifftqStatus->bTextAEqB );
+      if ( m_sd1.getSizeBytes()==0 ) pTotalDifftqStatus->bTextAEqB=false;
 
       pp.step();
    }
@@ -337,9 +337,9 @@ void KDiff3App::init( bool bAuto, TotalDiffStatus* pTotalDiffStatus, bool bLoadF
          pp.step();
       }
 
-      pTotalDiffStatus->bBinaryAEqB = m_sd1.isBinaryEqualWith( m_sd2 );
-      pTotalDiffStatus->bBinaryAEqC = m_sd1.isBinaryEqualWith( m_sd3 );
-      pTotalDiffStatus->bBinaryBEqC = m_sd3.isBinaryEqualWith( m_sd2 );
+      pTotalDifftqStatus->bBinaryAEqB = m_sd1.isBinaryEqualWith( m_sd2 );
+      pTotalDifftqStatus->bBinaryAEqC = m_sd1.isBinaryEqualWith( m_sd3 );
+      pTotalDifftqStatus->bBinaryBEqC = m_sd3.isBinaryEqualWith( m_sd2 );
 
       pp.setInformation(i18n("Diff: A <-> B"));
       runDiff( m_sd1.getLineDataForDiff(), m_sd1.getSizeLines(), m_sd2.getLineDataForDiff(), m_sd2.getSizeLines(), m_diffList12,1,2 );
@@ -364,16 +364,16 @@ void KDiff3App::init( bool bAuto, TotalDiffStatus* pTotalDiffStatus, bool bLoadF
       debugLineCheck( m_diff3LineList, m_sd3.getSizeLines(), 3 );
 
       pp.setInformation(i18n("Linediff: A <-> B"));
-      fineDiff( m_diff3LineList, 1, m_sd1.getLineDataForDisplay(), m_sd2.getLineDataForDisplay(), pTotalDiffStatus->bTextAEqB );
+      fineDiff( m_diff3LineList, 1, m_sd1.getLineDataForDisplay(), m_sd2.getLineDataForDisplay(), pTotalDifftqStatus->bTextAEqB );
       pp.step();
       pp.setInformation(i18n("Linediff: B <-> C"));
-      fineDiff( m_diff3LineList, 2, m_sd2.getLineDataForDisplay(), m_sd3.getLineDataForDisplay(), pTotalDiffStatus->bTextBEqC );
+      fineDiff( m_diff3LineList, 2, m_sd2.getLineDataForDisplay(), m_sd3.getLineDataForDisplay(), pTotalDifftqStatus->bTextBEqC );
       pp.step();
       pp.setInformation(i18n("Linediff: A <-> C"));
-      fineDiff( m_diff3LineList, 3, m_sd3.getLineDataForDisplay(), m_sd1.getLineDataForDisplay(), pTotalDiffStatus->bTextAEqC );
+      fineDiff( m_diff3LineList, 3, m_sd3.getLineDataForDisplay(), m_sd1.getLineDataForDisplay(), pTotalDifftqStatus->bTextAEqC );
       pp.step();
-      if ( m_sd1.getSizeBytes()==0 ) { pTotalDiffStatus->bTextAEqB=false;  pTotalDiffStatus->bTextAEqC=false; }
-      if ( m_sd2.getSizeBytes()==0 ) { pTotalDiffStatus->bTextAEqB=false;  pTotalDiffStatus->bTextBEqC=false; }
+      if ( m_sd1.getSizeBytes()==0 ) { pTotalDifftqStatus->bTextAEqB=false;  pTotalDifftqStatus->bTextAEqC=false; }
+      if ( m_sd2.getSizeBytes()==0 ) { pTotalDifftqStatus->bTextAEqB=false;  pTotalDifftqStatus->bTextBEqC=false; }
    }
    m_diffBufferInfo.init( &m_diff3LineList, &m_diff3LineVector,
       m_sd1.getLineDataForDiff(), m_sd1.getSizeLines(),
@@ -420,7 +420,7 @@ void KDiff3App::init( bool bAuto, TotalDiffStatus* pTotalDiffStatus, bool bLoadF
       m_sd2.getLineDataForDisplay(), m_sd2.getSizeLines(),
       m_bTripleDiff ? m_sd3.getLineDataForDisplay() : 0, m_sd3.getSizeLines(),
       &m_diff3LineList,
-      pTotalDiffStatus      
+      pTotalDifftqStatus      
       );
    m_pMergeResultWindowTitle->setFileName( m_outputFilename.isEmpty() ? TQString("unnamed.txt") : m_outputFilename );
 
@@ -507,17 +507,17 @@ void KDiff3App::init( bool bAuto, TotalDiffStatus* pTotalDiffStatus, bool bLoadF
          )
       {
          TQString totalInfo;
-         if ( pTotalDiffStatus->bBinaryAEqB && pTotalDiffStatus->bBinaryAEqC )
+         if ( pTotalDifftqStatus->bBinaryAEqB && pTotalDifftqStatus->bBinaryAEqC )
             totalInfo += i18n("All input files are binary equal.");
-         else  if ( pTotalDiffStatus->bTextAEqB && pTotalDiffStatus->bTextAEqC )
+         else  if ( pTotalDifftqStatus->bTextAEqB && pTotalDifftqStatus->bTextAEqC )
             totalInfo += i18n("All input files contain the same text, but are not binary equal.");
          else {
-            if    ( pTotalDiffStatus->bBinaryAEqB ) totalInfo += i18n("Files %1 and %2 are binary equal.\n"                          ).arg("A").arg("B");
-            else if ( pTotalDiffStatus->bTextAEqB ) totalInfo += i18n("Files %1 and %2 have equal text, but are not binary equal. \n").arg("A").arg("B");
-            if    ( pTotalDiffStatus->bBinaryAEqC ) totalInfo += i18n("Files %1 and %2 are binary equal.\n"                          ).arg("A").arg("C");
-            else if ( pTotalDiffStatus->bTextAEqC ) totalInfo += i18n("Files %1 and %2 have equal text, but are not binary equal. \n").arg("A").arg("C");
-            if    ( pTotalDiffStatus->bBinaryBEqC ) totalInfo += i18n("Files %1 and %2 are binary equal.\n"                          ).arg("B").arg("C");
-            else if ( pTotalDiffStatus->bTextBEqC ) totalInfo += i18n("Files %1 and %2 have equal text, but are not binary equal. \n").arg("B").arg("C");
+            if    ( pTotalDifftqStatus->bBinaryAEqB ) totalInfo += i18n("Files %1 and %2 are binary equal.\n"                          ).tqarg("A").tqarg("B");
+            else if ( pTotalDifftqStatus->bTextAEqB ) totalInfo += i18n("Files %1 and %2 have equal text, but are not binary equal. \n").tqarg("A").tqarg("B");
+            if    ( pTotalDifftqStatus->bBinaryAEqC ) totalInfo += i18n("Files %1 and %2 are binary equal.\n"                          ).tqarg("A").tqarg("C");
+            else if ( pTotalDifftqStatus->bTextAEqC ) totalInfo += i18n("Files %1 and %2 have equal text, but are not binary equal. \n").tqarg("A").tqarg("C");
+            if    ( pTotalDifftqStatus->bBinaryBEqC ) totalInfo += i18n("Files %1 and %2 are binary equal.\n"                          ).tqarg("B").tqarg("C");
+            else if ( pTotalDifftqStatus->bTextBEqC ) totalInfo += i18n("Files %1 and %2 have equal text, but are not binary equal. \n").tqarg("B").tqarg("C");
          }
 
          if ( !totalInfo.isEmpty() )
@@ -609,14 +609,14 @@ void KDiff3App::sourceMask( int srcMask, int enabledMask )
 
 
 
-// Function uses setMinSize( sizeHint ) before adding the widget.
-// void addWidget(TQBoxLayout* layout, TQWidget* widget);
+// Function uses setMinSize( tqsizeHint ) before adding the widget.
+// void addWidget(TQBoxLayout* tqlayout, TQWidget* widget);
 template <class W, class L>
-void addWidget( L* layout, W* widget)
+void addWidget( L* tqlayout, W* widget)
 {
-   TQSize s = widget->sizeHint();
+   TQSize s = widget->tqsizeHint();
    widget->setMinimumSize( TQSize(max2(s.width(),0),max2(s.height(),0) ) );
-   layout->addWidget( widget );
+   tqlayout->addWidget( widget );
 }
 
 void KDiff3App::initView()
@@ -1071,7 +1071,7 @@ void KDiff3App::slotFileOpen()
 }
 
 void KDiff3App::slotFileOpen2(TQString fn1, TQString fn2, TQString fn3, TQString ofn,
-                              TQString an1, TQString an2, TQString an3, TotalDiffStatus* pTotalDiffStatus )
+                              TQString an1, TQString an2, TQString an3, TotalDifftqStatus* pTotalDifftqStatus )
 {
    if ( !canContinue() ) return;
 
@@ -1111,9 +1111,9 @@ void KDiff3App::slotFileOpen2(TQString fn1, TQString fn2, TQString fn3, TQString
    else
    {
       m_bDirCompare = bDirCompare;  // Don't allow this to change here.
-      init( false, pTotalDiffStatus );
+      init( false, pTotalDifftqStatus );
 
-      if ( pTotalDiffStatus!=0 )
+      if ( pTotalDifftqStatus!=0 )
          return;
 
       if ( ! m_sd1.isEmpty() && ! m_sd1.hasData()  ||
@@ -1174,7 +1174,7 @@ void KDiff3App::slotEditCut()
 
    if ( !s.isNull() )
    {
-      TQApplication::clipboard()->setText( s, TQClipboard::Clipboard );
+      TQApplication::tqclipboard()->setText( s, TQClipboard::Clipboard );
    }
 
    slotStatusMsg(i18n("Ready."));
@@ -1190,7 +1190,7 @@ void KDiff3App::slotEditCopy()
    if ( s.isNull() && m_pMergeResultWindow!=0 ) s = m_pMergeResultWindow->getSelection();
    if ( !s.isNull() )
    {
-      TQApplication::clipboard()->setText( s, TQClipboard::Clipboard );
+      TQApplication::tqclipboard()->setText( s, TQClipboard::Clipboard );
    }
 
    slotStatusMsg(i18n("Ready."));
@@ -1208,17 +1208,17 @@ void KDiff3App::slotEditPaste()
    {
       if ( m_pDiffTextWindow1->hasFocus() )
       {
-         m_sd1.setData( TQApplication::clipboard()->text(TQClipboard::Clipboard) );
+         m_sd1.setData( TQApplication::tqclipboard()->text(TQClipboard::Clipboard) );
          init();
       }
       else if ( m_pDiffTextWindow2->hasFocus() )
       {
-         m_sd2.setData( TQApplication::clipboard()->text(TQClipboard::Clipboard) );
+         m_sd2.setData( TQApplication::tqclipboard()->text(TQClipboard::Clipboard) );
          init();
       }
       else if ( m_pDiffTextWindow3->hasFocus() )
       {
-         m_sd3.setData( TQApplication::clipboard()->text(TQClipboard::Clipboard) );
+         m_sd3.setData( TQApplication::tqclipboard()->text(TQClipboard::Clipboard) );
          init();
       }
    }
@@ -1465,7 +1465,7 @@ void KDiff3App::slotSelectionEnd()
    }
    else
    {
-       TQClipboard *clipBoard = TQApplication::clipboard();
+       TQClipboard *clipBoard = TQApplication::tqclipboard();
 
        if (clipBoard->supportsSelection ())
        {
@@ -1484,7 +1484,7 @@ void KDiff3App::slotSelectionEnd()
 
 void KDiff3App::slotClipboardChanged()
 {
-   TQString s = TQApplication::clipboard()->text();
+   TQString s = TQApplication::tqclipboard()->text();
    //editPaste->setEnabled(!s.isEmpty());
 }
 
@@ -1969,7 +1969,7 @@ void KDiff3App::slotMergeCurrentFile()
 
 void KDiff3App::slotWinFocusNext()
 {
-   TQWidget* focus = tqApp->focusWidget();
+   TQWidget* focus = tqApp->tqfocusWidget();
    if ( focus == m_pDirectoryMergeWindow && m_pDirectoryMergeWindow->isVisible() && ! dirShowBoth->isChecked() )
    {
       slotDirViewToggle();
@@ -1999,7 +1999,7 @@ void KDiff3App::slotWinFocusNext()
 
 void KDiff3App::slotWinFocusPrev()
 {
-   TQWidget* focus = tqApp->focusWidget();
+   TQWidget* focus = tqApp->tqfocusWidget();
    if ( focus == m_pDirectoryMergeWindow  && m_pDirectoryMergeWindow->isVisible() && ! dirShowBoth->isChecked() )
    {
       slotDirViewToggle();
diff --git a/src/smalldialogs.cpp b/src/smalldialogs.cpp
index 8c70b66..7dc6340 100644
--- a/src/smalldialogs.cpp
+++ b/src/smalldialogs.cpp
@@ -25,7 +25,7 @@
 #include <tqcheckbox.h>
 #include <tqlineedit.h>
 #include <tqlabel.h>
-#include <layout.h>
+#include <tqlayout.h>
 #include <tqpushbutton.h>
 #include <tqdragobject.h>
 #include <tqregexp.h>
@@ -111,15 +111,15 @@ OpenDialog::OpenDialog(
 
    TQPopupMenu* m = new TQPopupMenu(this);
    int id=0;
-   m->insertItem( i18n("Swap %1<->%2").arg("A").arg("B"), id++ );
-   m->insertItem( i18n("Swap %1<->%2").arg("B").arg("C"), id++ );
-   m->insertItem( i18n("Swap %1<->%2").arg("C").arg("A"), id++ );
-   m->insertItem( i18n("Copy %1->Output").arg("A"), id++ );
-   m->insertItem( i18n("Copy %1->Output").arg("B"), id++ );
-   m->insertItem( i18n("Copy %1->Output").arg("C"), id++  );
-   m->insertItem( i18n("Swap %1<->Output").arg("A"), id++  );
-   m->insertItem( i18n("Swap %1<->Output").arg("B"), id++  );
-   m->insertItem( i18n("Swap %1<->Output").arg("C"), id++  );
+   m->insertItem( i18n("Swap %1<->%2").tqarg("A").tqarg("B"), id++ );
+   m->insertItem( i18n("Swap %1<->%2").tqarg("B").tqarg("C"), id++ );
+   m->insertItem( i18n("Swap %1<->%2").tqarg("C").tqarg("A"), id++ );
+   m->insertItem( i18n("Copy %1->Output").tqarg("A"), id++ );
+   m->insertItem( i18n("Copy %1->Output").tqarg("B"), id++ );
+   m->insertItem( i18n("Copy %1->Output").tqarg("C"), id++  );
+   m->insertItem( i18n("Swap %1<->Output").tqarg("A"), id++  );
+   m->insertItem( i18n("Swap %1<->Output").tqarg("B"), id++  );
+   m->insertItem( i18n("Swap %1<->Output").tqarg("C"), id++  );
    connect( m, TQT_SIGNAL(activated(int)), this, TQT_SLOT(slotSwapCopyNames(int)));
    button->setPopup(m);
 
@@ -170,7 +170,7 @@ OpenDialog::OpenDialog(
    connect( button, TQT_SIGNAL(clicked()), this, TQT_SLOT( reject() ) );
    l->addWidget( button,1 );
 
-   TQSize sh = sizeHint();
+   TQSize sh = tqsizeHint();
    setFixedHeight( sh.height() );
    m_bInputFileNameChanged = false;
 
@@ -339,47 +339,47 @@ void OpenDialog::slotSwapCopyNames( int id ) // id selected in the popup menu
 FindDialog::FindDialog(TQWidget* pParent)
 : TQDialog( pParent )
 {
-   TQGridLayout* layout = new TQGridLayout( this );
-   layout->setMargin(5);
-   layout->setSpacing(5);
+   TQGridLayout* tqlayout = new TQGridLayout( this );
+   tqlayout->setMargin(5);
+   tqlayout->setSpacing(5);
 
    int line=0;
-   layout->addMultiCellWidget( new TQLabel(i18n("Search text:"),this), line,line,0,1 );
+   tqlayout->addMultiCellWidget( new TQLabel(i18n("Search text:"),this), line,line,0,1 );
    ++line;
 
    m_pSearchString = new TQLineEdit( this );
-   layout->addMultiCellWidget( m_pSearchString, line,line,0,1 );
+   tqlayout->addMultiCellWidget( m_pSearchString, line,line,0,1 );
    ++line;
 
    m_pCaseSensitive = new TQCheckBox(i18n("Case sensitive"),this);
-   layout->addWidget( m_pCaseSensitive, line, 1 );
+   tqlayout->addWidget( m_pCaseSensitive, line, 1 );
 
    m_pSearchInA = new TQCheckBox(i18n("Search A"),this);
-   layout->addWidget( m_pSearchInA, line, 0 );
+   tqlayout->addWidget( m_pSearchInA, line, 0 );
    m_pSearchInA->setChecked( true );
    ++line;
 
    m_pSearchInB = new TQCheckBox(i18n("Search B"),this);
-   layout->addWidget( m_pSearchInB, line, 0 );
+   tqlayout->addWidget( m_pSearchInB, line, 0 );
    m_pSearchInB->setChecked( true );
    ++line;
 
    m_pSearchInC = new TQCheckBox(i18n("Search C"),this);
-   layout->addWidget( m_pSearchInC, line, 0 );
+   tqlayout->addWidget( m_pSearchInC, line, 0 );
    m_pSearchInC->setChecked( true );
    ++line;
 
    m_pSearchInOutput = new TQCheckBox(i18n("Search output"),this);
-   layout->addWidget( m_pSearchInOutput, line, 0 );
+   tqlayout->addWidget( m_pSearchInOutput, line, 0 );
    m_pSearchInOutput->setChecked( true );
    ++line;
 
    TQPushButton* pButton = new TQPushButton( i18n("&Search"), this );
-   layout->addWidget( pButton, line, 0 );
+   tqlayout->addWidget( pButton, line, 0 );
    connect( pButton, TQT_SIGNAL(clicked()), this, TQT_SLOT(accept()));
 
    pButton = new TQPushButton( i18n("&Cancel"), this );
-   layout->addWidget( pButton, line, 1 );
+   tqlayout->addWidget( pButton, line, 1 );
    connect( pButton, TQT_SIGNAL(clicked()), this, TQT_SLOT(reject()));
 
    hide();
@@ -498,7 +498,7 @@ RegExpTester::RegExpTester( TQWidget* pParent, const TQString& autoMergeRegExpTo
    pGrid->addWidget(pButton,line,1);
    connect( pButton, TQT_SIGNAL(clicked()), this, TQT_SLOT(reject()));
 
-   resize( 800, sizeHint().height() );
+   resize( 800, tqsizeHint().height() );
 }
 
 void RegExpTester::init( const TQString& autoMergeRegExp, const TQString& historyStartRegExp, const TQString& historyEntryStartRegExp, const TQString historySortKeyOrder )